Guadeloupe 1876 Folded Letter 40c Orange to Bordeaux France

40c Orange (French Colonies Sc #14), four-margin single tied to 1876 entire folded letter to France by black lozenge cancel, matching "Guadeloupe/Moule/10 Aout 76" double-circle c.d.s., Pointe-a-Pitre French packet sorting transit c.d.s. along with Line "B" packet transit on the reverse, backstamped Bordeaux, a lovely cover; signed Calves and Sorani. Guadeloupe joined the U.P.U. on July 1, 1876; this cover, which paid the 15g foreign mail rate, is a very early example.